By Malcolm L. Hunter Jr., James P. Gibbs
Within the re-creation of this hugely winning booklet, Malcolm Hunter and new co-author James Gibbs provide a radical creation to the attention-grabbing and critical box of conservation biology, concentrating on what could be performed to take care of biodiversity via administration of ecosystems and populations.
- Starting with a succinct examine conservation and biodiversity, this e-book progresses to cope with the various subject's most intricate issues, equivalent to mass extinctions, environment degradation, and over exploitation.
- Discusses social, political, and financial elements of conservation biology.
- Thoroughly revised with over 600 new references and net hyperlinks to some of the companies keen on conservation biology, remarkable images and maps.
Artwork from the ebook is offered to teachers on-line at www.blackwellpublishing.com/hunter and by way of request on CD-ROM.
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Extra resources for Fundamentals of conservation biology
Leopold’s ideas gave people the right to use and manage nature and the responsibility of doing so in a manner that recognized the intrinsic value of other species and whole ecosystems. Indeed, he contended that the very tools that had been so frequently used to destroy the environment (namely the axe and the plow) could also be creatively applied to heal it, especially if informed by science. All three of these ethics are still thriving. The Resource Conservation Ethic guides the actions of natural resource-based industries and their associated government agencies, although some would argue that the profit motive is too often the stronger guide.
In the face of this competition, the native species have declined dramatically, and only four native species remain common in the lake. Worse still, two of the native species that have disappeared from the lake (the Clear Lake splittail and the thicktail chub) are globally extinct. The net scorecard: misguided attempts to enrich the fish fauna of Clear Lake have increased the number of fish species there from 12 to 25 by adding 16 exotic species, but these introductions have decimated the lake’s native fish fauna, eliminating two elements of biodiversity from the entire planet and reducing gamma diversity.
Evenness = H/Hmax , where Hmax is the maximum possible value of H. 2 Abundance of species (number/hectare) in three ecosystems and measures of richness, evenness, and the Shannon diversity index (H), one of many ways to combine richness and evenness quantitatively (Magurran 2004). 26 Part I Biodiversity and Its Importance biologists would be concerned about any process that reduced evenness, because this would mean uncommon species are becoming less common, while common species are becoming more common.